• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Molecular biology and evolution >Origin and Evolution of the Chloroplast trnK (matK) Intron: A Model for Evolution of Group II Intron RNA Structures
【24h】

Origin and Evolution of the Chloroplast trnK (matK) Intron: A Model for Evolution of Group II Intron RNA Structures

机译：叶绿体trnK（matK）内含子的起源和进化：第二组内含子RNA结构进化的模型。

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The trnK intron of plants encodes the matK open reading frame (ORF), which has been used extensively as a phylogenetic marker for classification of plants. Here we examined the evolution of the trnK intron itself as a model for group II intron evolution in plants. Representative trnK intron sequences were compiled from species spanning algae to angiosperms, and four introns were newly sequenced. Phylogenetic analyses showed that the matK ORFs belong to the ML (mitochondrial-like) subclass of group II intron ORFs, indicating that they were derived from a mobile group II intron of the class. RNA structures of the introns were folded and analyzed, which revealed progressive RNA structural deviations and degenerations throughout plant evolution. The data support a model in which plant organellar group II introns were derived from bacterial-like introns that had "standard" RNA structures and were competent for self-splicing and mobility and that subsequently the ribozyme structures degenerated to ultimately become dependent upon host-splicing factors. We propose that the patterns of RNA structure evolution seen for the trnK intron will apply to the other group II introns in plants.
机译：植物的trnK内含子编码matK开放阅读框（ORF），该框架已广泛用作植物分类的系统发育标记。在这里，我们检查了trnK内含子本身的进化，作为植物中II组内含子进化的模型。从横跨藻类到被子植物的物种汇编了代表性的trnK内含子序列，并对四个内含子进行了新的测序。系统发育分析表明，matK ORF属于II类内含子ORF的ML（线粒体样）亚类，表明它们来自该类别的可移动II类内含子。折叠并分析内含子的RNA结构，揭示整个植物进化过程中进行性RNA结构的偏离和变性。数据支持一个模型，其中植物细胞器第二组内含子来自具有“标准” RNA结构并能自我剪接和迁移的细菌样内含子，随后核酶结构退化最终成为宿主剪接因素。我们建议看到的trnK内含子的RNA结构进化的模式将适用于植物中的其他第二组内含子。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号